CN102004166A - Measuring device and method of rotating speed of brush motor - Google Patents
Measuring device and method of rotating speed of brush motor Download PDFInfo
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- CN102004166A CN102004166A CN 201010285682 CN201010285682A CN102004166A CN 102004166 A CN102004166 A CN 102004166A CN 201010285682 CN201010285682 CN 201010285682 CN 201010285682 A CN201010285682 A CN 201010285682A CN 102004166 A CN102004166 A CN 102004166A
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Abstract
The invention provides a measuring device and method of the rotating speed of a brush motor. The measuring device comprises a current sampling resistor, a signal amplifying device, a signal filtering device, a signal shaping device and a pulse width and frequency measuring device which are sequentially connected, wherein the current sampling resistor is connected with the brush motor. The measuring method comprises the following steps of: converting a current break pulse into a small voltage signal through the current sampling resistor when a current break pulse signal of the brush motor is generated during the commutation of a commutator of the brush motor; amplifying the small voltage signal into a large voltage signal through the signal amplifying device; carrying out bandpass filtering through the signal filtering device to select a sinusoidal signal of a commutating pulse of the commutator; shaping the sinusoidal signal into a rectangular wave pulse signal through the signal shaping device; measuring a pulse width or frequency through the pulse width and frequency measuring device, and carrying out conversion according to the number of pole pairs of the commutator of the brush motor to obtain the final rotting speed of the brush motor. The measuring device can be used for accurately measuring the rotating speed of the brush motor, is easy to operate and can enhance the production efficiency.
Description
Technical field
The present invention relates to a kind of brush motor rotation-speed measuring device and measuring method.
Background technology
In rotating speed of motor is measured, especially on the testing apparatus of the product of volume production or volume production product, the method of generally taking is to stick the cursor scraps of paper that a reflector laser is used at motor shaft or the positions such as blower fan that link to each other with axle, measure rotating speed with laser velocimeter then, it is by emission of lasering beam, and motor whenever turns around then, and laser beam is reflected once by the cursor scraps of paper, obtain reflected impulse of every circle, calculate motor speed with this.This method has three problems: the one, and motor of every measurement all must have the cursor of subsides paper, tears two loaded down with trivial details actions of cursor paper; The 2nd, in the measuring process, the cursor scraps of paper that must very accurately laser alignment be pasted; The 3rd, motor whenever turns around, and laser only is reflected once, this commentaries on classics one the circle within, measurement be the mean speed of this circle, the fluctuation up and down of motor speed can't be measured.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of brush motor rotation-speed measuring device and measuring method, can accurately measure the rotating speed of brush motor, and simple to operate, can enhance productivity.
For solving above-mentioned existing technical matters, the present invention adopts following scheme: a kind of brush motor rotation-speed measuring device comprises the current sampling resistor that is connected with motor, the signal amplifying apparatus that is connected with current sampling resistor, the signal filtering device that is connected with signal amplifying apparatus, the signal shaping that is connected with the signal filtering device, the pulse duration frequency measurement mechanism that is connected with signal shaping.
As preferably, described signal filtering device adopts the logical switching capacity filter of high-order band.Can the unwanted noise signal of more accurate filtering, strengthen its signal to noise ratio (S/N ratio).
A kind of brush motor rotating speed measurement method comprises following steps:
Step 1: can produce current of electric sudden change pulse signal during the commutation of the commutator of motor, the current of electric pulse signal that suddenlys change is converted to little voltage signal by current sampling resistor;
Step 2: little voltage signal is enlarged into big voltage signal by signal amplifying apparatus;
Step 3: by the signal filtering device big voltage signal is carried out bandpass filtering, select the sinusoidal signal of commutator commutating pulse;
Step 4: be shaped as square-wave signal by the sinusoidal signal of signal shaping after with pulse bandwidth filtering;
Step 5: square-wave signal is carried out pulsewidth or frequency measurement by the pulse duration frequency measurement mechanism, and convert according to motor commutator number of pole-pairs, motor speed ω=60*F/N unit is rev/min, wherein F is the commutator commutating pulse frequency that measures, N is the commutator number of pole-pairs, obtains final motor speed.
As preferably, described signal filtering device adopts the logical switching capacity filter of high-order band, controls lower limiting frequency by the clock signal frequency of the logical switching capacity filter of control high-order band.Simple to operate.
Beneficial effect:
The present invention adopts technique scheme that a kind of brush motor rotation-speed measuring device and measuring method are provided, and can accurately measure the rotating speed of brush motor, and simple to operate, has improved production efficiency.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of brush motor rotation-speed measuring device comprises the current sampling resistor 2 that is connected with motor 1, the signal amplifying apparatus 3 that is connected with current sampling resistor 2, the signal filtering device 4 that is connected with signal amplifying apparatus 3, the signal shaping 5 that is connected with signal filtering device 4, the pulse duration frequency measurement mechanism 6 that is connected with signal shaping 5.Described signal filtering device 4 adopts the logical switching capacity filter of high-order band.
A kind of brush motor rotating speed measurement method comprises following steps:
Step 1: can produce current of electric sudden change pulse signal during the commutation of the commutator of motor 1, the current of electric pulse signal that suddenlys change is converted to little voltage signal by current sampling resistor 2;
Step 2: small voltage signal is enlarged into big voltage signal by signal amplifying apparatus 3;
Step 3: by signal filtering device 4 big voltage signal is carried out bandpass filtering, select the sinusoidal signal of commutator commutating pulse;
Step 4: the sinusoidal signal after the pulse bandwidth filtering is shaped as square-wave signal by signal shaping 5;
Step 5: carry out pulsewidth or frequency measurement by 6 pairs of square-wave signals of pulse duration frequency measurement mechanism, and convert according to motor commutator number of pole-pairs, motor speed ω=60*F/N unit is rev/min, wherein F is the commutator commutating pulse frequency that measures, N is the commutator number of pole-pairs, obtains final motor speed.
Described signal filtering device 4 adopts the logical switching capacity filter of high-order band, controls lower limiting frequency by the clock signal frequency of the logical switching capacity filter of control high-order band.The rotating speed of motor of different model is measured can be according to the rotating speed of motor approximate range of different model, control the last lower limiting frequency of bandpass filter by the clock signal frequency of computer controlled automatic bandpass filter, the unwanted noise signal of more accurate filtering strengthens its signal to noise ratio (S/N ratio).
Claims (4)
1. brush motor rotation-speed measuring device is characterized in that: comprise the current sampling resistor (2) that is connected with motor (1), the signal amplifying apparatus (3) that is connected with current sampling resistor (2), the signal filtering device (4) that is connected with signal amplifying apparatus (3), the signal shaping (5) that is connected with signal filtering device (4), the pulse duration frequency measurement mechanism (6) that is connected with signal shaping (5).
2. a kind of brush motor rotation-speed measuring device according to claim 1 is characterized in that: described signal filtering device (4) adopts the logical switching capacity filter of high-order band.
3. brush motor rotating speed measurement method is characterized in that: comprise following steps:
Step 1: can produce current of electric sudden change pulse signal during the commutation of the commutator of motor (1), the current of electric pulse signal that suddenlys change is converted to little voltage signal by current sampling resistor (2);
Step 2: little voltage signal is enlarged into big voltage signal by signal amplifying apparatus (3);
Step 3: by signal filtering device (4) big voltage signal is carried out bandpass filtering, select the sinusoidal signal of commutator commutating pulse;
Step 4: the sinusoidal signal after the pulse bandwidth filtering is shaped as square-wave signal by signal shaping (5);
Step 5: square-wave signal is carried out pulsewidth or frequency measurement by pulse duration frequency measurement mechanism (6), and convert according to motor commutator number of pole-pairs, motor speed ω=60*F/N unit is rev/min, wherein F is the commutator commutating pulse frequency that measures, N is the commutator number of pole-pairs, obtains final motor speed.
4. a kind of brush motor rotating speed measurement method according to claim 3, it is characterized in that: described signal filtering device (4) adopts the logical switching capacity filter of high-order band, controls lower limiting frequency by the clock signal frequency of the logical switching capacity filter of control high-order band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102856827A CN102004166B (en) | 2010-09-17 | 2010-09-17 | Device and method for measuring rotating speed of brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102856827A CN102004166B (en) | 2010-09-17 | 2010-09-17 | Device and method for measuring rotating speed of brush motor |
Publications (2)
| Publication Number | Publication Date |
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| CN102004166A true CN102004166A (en) | 2011-04-06 |
| CN102004166B CN102004166B (en) | 2012-05-30 |
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| CN2010102856827A Expired - Fee Related CN102004166B (en) | 2010-09-17 | 2010-09-17 | Device and method for measuring rotating speed of brush motor |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621344A (en) * | 2012-03-17 | 2012-08-01 | 佛山市顺德区海伦宝电器有限公司 | Magnetic induction rotation speed measuring device |
| CN103033640A (en) * | 2012-12-04 | 2013-04-10 | 中国北方车辆研究所 | Vehicle speed real-time detection method with field programmable gate array (FPGA) |
| CN103344779A (en) * | 2013-05-09 | 2013-10-09 | 重庆南方数控设备有限责任公司 | Apparatus and method for obtaining rotating speed of direct-current motor for driving peristaltic pump |
| WO2014089938A1 (en) * | 2012-12-13 | 2014-06-19 | 中国北车集团大连机车车辆有限公司 | Detection method used for locomotive traction motor speed signals and based on magnetoelectric sensor |
| CN104197964A (en) * | 2014-08-26 | 2014-12-10 | 宁波双林汽车部件股份有限公司 | Current waveform/rectangular pulse conversion circuit device |
| CN104986282A (en) * | 2015-07-15 | 2015-10-21 | 四川安尔达电动车有限公司 | Electric bicycle control method and apparatus |
| CN105083057A (en) * | 2014-04-25 | 2015-11-25 | 德昌电机(深圳)有限公司 | Seat position adjusting system and method |
| CN105680744A (en) * | 2016-03-08 | 2016-06-15 | 江苏仁源电气有限公司 | Speed regulation device and speed regulation method of DC brush motor |
| CN105675906A (en) * | 2016-03-08 | 2016-06-15 | 江苏仁源电气有限公司 | Direct current brushed motor speed measurement device and speed measurement method |
| CN106908726A (en) * | 2017-03-09 | 2017-06-30 | 迈普通信技术股份有限公司 | The working condition detecting system of direct current generator, method and the network equipment |
| CN109861598A (en) * | 2017-11-30 | 2019-06-07 | 大陆汽车电子(芜湖)有限公司 | System and method for detecting the revolving speed of brushed DC motor |
| CN110275043A (en) * | 2019-06-21 | 2019-09-24 | 拉扎斯网络科技（上海）有限公司 | Method and device for detecting rotating speed of direct current motor, storage medium and electronic equipment |
| CN114264836A (en) * | 2021-12-22 | 2022-04-01 | 南京苏美达智能技术有限公司 | Method for detecting rotating speed of brush motor and automatic walking equipment |
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| CN2232587Y (en) * | 1994-07-19 | 1996-08-07 | 沈跃 | Engine rotational speed meter |
| CN2298519Y (en) * | 1997-05-28 | 1998-11-25 | 谢德约 | Engine frequency/speed measuring appliance |
| CN2733360Y (en) * | 2004-08-07 | 2005-10-12 | 周开勇 | Rotation speed measuring circuit for brush DC dynamo and rotation speed regulate and control device using the circuit |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621344B (en) * | 2012-03-17 | 2014-07-16 | 佛山市顺德区海伦宝电器有限公司 | Magnetic induction rotation speed measuring device |
| CN102621344A (en) * | 2012-03-17 | 2012-08-01 | 佛山市顺德区海伦宝电器有限公司 | Magnetic induction rotation speed measuring device |
| CN103033640A (en) * | 2012-12-04 | 2013-04-10 | 中国北方车辆研究所 | Vehicle speed real-time detection method with field programmable gate array (FPGA) |
| CN103033640B (en) * | 2012-12-04 | 2014-12-10 | 中国北方车辆研究所 | Vehicle speed real-time detection method with field programmable gate array (FPGA) |
| WO2014089938A1 (en) * | 2012-12-13 | 2014-06-19 | 中国北车集团大连机车车辆有限公司 | Detection method used for locomotive traction motor speed signals and based on magnetoelectric sensor |
| CN103344779A (en) * | 2013-05-09 | 2013-10-09 | 重庆南方数控设备有限责任公司 | Apparatus and method for obtaining rotating speed of direct-current motor for driving peristaltic pump |
| CN103344779B (en) * | 2013-05-09 | 2016-02-03 | 重庆南方数控设备有限责任公司 | A kind of apparatus and method obtaining driving peristaltic pump DC motor speed |
| CN105083057A (en) * | 2014-04-25 | 2015-11-25 | 德昌电机(深圳)有限公司 | Seat position adjusting system and method |
| CN104197964A (en) * | 2014-08-26 | 2014-12-10 | 宁波双林汽车部件股份有限公司 | Current waveform/rectangular pulse conversion circuit device |
| CN104986282B (en) * | 2015-07-15 | 2018-05-15 | 四川安尔达电动车有限公司 | The control method and device of electric bicycle |
| CN104986282A (en) * | 2015-07-15 | 2015-10-21 | 四川安尔达电动车有限公司 | Electric bicycle control method and apparatus |
| CN105680744A (en) * | 2016-03-08 | 2016-06-15 | 江苏仁源电气有限公司 | Speed regulation device and speed regulation method of DC brush motor |
| CN105675906A (en) * | 2016-03-08 | 2016-06-15 | 江苏仁源电气有限公司 | Direct current brushed motor speed measurement device and speed measurement method |
| CN106908726A (en) * | 2017-03-09 | 2017-06-30 | 迈普通信技术股份有限公司 | The working condition detecting system of direct current generator, method and the network equipment |
| CN106908726B (en) * | 2017-03-09 | 2019-09-03 | 迈普通信技术股份有限公司 | Working condition detection system, method and the network equipment of direct current generator |
| CN109861598A (en) * | 2017-11-30 | 2019-06-07 | 大陆汽车电子(芜湖)有限公司 | System and method for detecting the revolving speed of brushed DC motor |
| CN109861598B (en) * | 2017-11-30 | 2020-12-04 | 纬湃汽车电子(芜湖)有限公司 | System and method for detecting rotation speed of brushed direct current motor |
| CN110275043A (en) * | 2019-06-21 | 2019-09-24 | 拉扎斯网络科技（上海）有限公司 | Method and device for detecting rotating speed of direct current motor, storage medium and electronic equipment |
| CN114264836A (en) * | 2021-12-22 | 2022-04-01 | 南京苏美达智能技术有限公司 | Method for detecting rotating speed of brush motor and automatic walking equipment |
| CN114264836B (en) * | 2021-12-22 | 2024-05-17 | 南京苏美达智能技术有限公司 | Method for detecting rotating speed of brush motor and automatic walking equipment |
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| CN102004166B (en) | 2012-05-30 |
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Inventor after: Chen Xuefeng Inventor after: Xu Zhengqing Inventor before: Xu Zhengqing |
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